/Engine/Source/Runtime/Engine/Public/MaterialShared.h
void GetTextureValue ( int32 Index, const [FMaterialRenderContext](API\Runtime\Engine\FMaterialRenderContext) & Context, const [FMaterial](API\Runtime\Engine\FMaterial) & Material, const [URuntimeVirtualTexture](API\Runtime\Engine\VT\URuntimeVirtualTexture) *& OutValue ) const